Color

#40b7e2

#40b7e2
hex#40b7e2
rgbrgb(64, 183, 226)
hslhsl(196, 74%, 57%)
oklchoklch(0.732 0.12 226.4)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.4045

Colors that go with #40b7e2

Charcoal, Amber and Dark Orange lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#e26b40

#40e2bd · #4066e2

#e240b7 · #b7e240

Split-complementary

Open in tool →

#e24066 · #e2bd40

#bd40e2 · #e26b40 · #66e240

Contrast

#40b7e2 as textRatioAAAA largeAAAFix
Aaon white
2.31:1failfailfail
  • AA: use #197fa4 as the text (4.55:1)
  • AAA: use #13607c as the text (7.02:1)
  • AA: or shift the background to #3d3d3d (4.7:1)
  • AAA: or shift the background to #1f1f1f (7.13:1)
Aaon black
9.09:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40b7e2 as the background.

Brands using this color

Fonts for this mood

#40b7e2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40b7e2
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #40b7e2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40b7e2-9cb5c4-df4e6e-1f232d-e9f1ef?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md